公开(公告)号：WO2021209110A1

公开(公告)日：2021-10-21

申请号：PCT/DK2021/050110

申请日：2021-04-15

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： KAZAR, Simon Stevns ,  BAUN, Torben Ladegaard ,  NIELSEN, Thomas S. Bjertrup ,  LARSEN, Torben Juul ,  SØRENSEN, Kim Hylling ,  NEUBAUER, Jesper Lykkegaard ,  PETTERSEN, Niels Hansborg

IPC: F03D7/02

Abstract: A method for controlling a yaw system (1) of a wind turbine is disclosed. The yaw system (1) comprises a toothed yaw ring (2) connected to one of a tower (8) or a nacelle (7) and an active yaw mechanism comprising at least one yaw drive (3) connected to the other of the tower (8) or the nacelle (7). Each yaw drive (3) comprises a pinion (5) configured to be arranged in engagement with the toothed yaw ring (2) and a drive mechanism (6) configured to drive the pinion (5). In the case that a wind speed and/or a turbulence and/or wind driven loads on the wind turbine exceeds a predefined threshold value, the active yaw mechanism is decoupled by decoupling at least the drive mechanism (6) of at least one of the yaw drives (3) from the yaw system (1). Subsequently the nacelle (7) is allowed to perform yaw movements relative to the tower (8) by means of free yawing.